Door lock gauge



M. SCHOTSCH DOOR LOCK GAUGE Jan. 4, 1955 Filed Nov- 30 1955 INVENTOR. MCHAEA ScoTscH 0 2 g +4 m m a m m 4 z. l4 3 24 0??? ga Il A United States Patent DOOR LOCK GAUGE Michael Schotsch, Ellwood City, Pa., assignor of thirtythree and one-third per cent to Julius Bloos, Ellwood City, Pa.

Application November 30, 1953, Serial No. 394,976

2 Claims. (Cl. 33-197) This invention relates to door lock gauges.

It is an object of the present invention to provide an improved door lock gauge which will permit prompt, accurate and easy installation of a door lock. It is another object of the present invention to provide a door lock gauge of the above type which is adapted to be used for gauging both the latch as Well as the strike. Other objects of the present invention are to provide a door lock gauge bearing the above objects in mind which is of simple construction, inexpensive to manufacture, has a minimum number of parts, is easy to use and efiicient in operation.

For other objects and a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which:

Figure 1 is a fragmentary transverse sectional view of a door and door jamb receiving the same and showing a latch and knob assembly installed in the door and showing the invention in operative use thereon for scribing the strike in the door jamb;

Fig. 2 is a fragmentary transverse sectional view of a door showing the door lock gauge in operative use thereon for installing the latch;

gig. 3 is a bottom plan view of the door lock gauge, an

4 is a sectional view taken along the line 4-4 of Referring now to the figures, there is shown a door lock gauge referred to collectively as and including a flat rectangular portion 11 offset from an elongated portion 12 by a middle portion 13, the middle portion 13 being disposed at right angles to the flat portion 11 and elongated portion 12. The face of fiat portion 11 adjacent the intermediate portion 13 is integrally formed around its periphery with a rectangular knife edge 14 continuous and adapted to markoff the recess for the latch face, as shown in Fig. 2, during the initial mounting operation. The face 11 within the knife edge 14 is also provided with a central point 15 for marking the center of the hole to be drilled for the latch bolt and receiving therein the center of the drill mouth piece. It will be noted that when the gauge 10 is placed on the vertical edge of door 16 (Fig. 2) the intermediate portion 13 abuts the face thereof and properly centers the "ice knife edge 14 along the vertical edge, as will be obvious. The rear face of the gauge 10 is then struck with a hammer to provide a continuous rectangular slit receiving the latch face when cut out into a recess and provided with a central hole formed by point 15 for receiving the drill mouth piece for boring the latch bolt hole.

The elongated portion 12 is provided with an opening 17 having parallel sides and adapted to fit snugly onto the latch end 18, as shown in Fig. 1, with the intermediate portion 13 resting against the adjacent face of the door 16 therebetween and abutting the door jam 19, thus properly positioning the continuous knife edge 14 in point 15 upon the door jamb. The gauge is again hit to inscribe the rectangular recess for the strike, not shown, as well as marking the central opening for receiving the drill mouth piece. Thus, the strike is properly positioned automatically as to height and lateral position, by positioning the elongated portion 12 on the latch end 18 and abutting the intermediate portion 13 between the door 16 and jamb 19.

Fig. 1 shows the latch assembly 20 after mounting and includes the knobs 21 and knob assembly 22 of well known construction.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

What is claimed is:

1. A door locking gauge comprising a substantially rectangular plate integrally formed around its periphery with a continuous, substantially rectangular scribing edge, a central scribing point secured to said plate within said scribing edge, said rectangular plate continuing beyond one longitudinal edge of said scribing edge, a predetermined amount, and being integrally formed with an intermediate portion at right angles thereto, said intermediate portion having a squared face adjacent said rectangular plate and adapted to abut the adjacent face of a door whereby to position said scribing edge laterally thereon, and an elongated portion integrally formed at the end of said intermediate portion remote from said rectangular plate and extending substantially parallel to said plate, said elongated portion having an opening therein adapted to receive snugly therewithin the end of the door latch after the latter has been mounted.

2. A marking gauge according to claim 1, said opening continuing along substantially the length of said elongated portion and extending through said intermediate portion and continuing along said rectangular plate to the adjacent edge of said scribing edge.

References Cited in the file of this patent UNITED STATES PATENTS 1,787,313 Houts Dec. 30, 1930 2,605,791 Zern Aug. 5, 1932 2,399,145 Schmidt Apr. 23, 1946 2,422,367 Quigley June 17, 1947 2,655,732 Morgan Oct. 20, 1953 

